1440533040 has 80 divisors (see below), whose sum is σ = 4505256288. Its totient is φ = 380735488.

The previous prime is 1440533027. The next prime is 1440533041. The reversal of 1440533040 is 403350441.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1440533040.

It is not an unprimeable number, because it can be changed into a prime (1440533041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562 + ... + 53678.

Almost surely, 2^1440533040 is an apocalyptic number.

1440533040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440533040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252628144).

1440533040 is an abundant number, since it is smaller than the sum of its proper divisors (3064723248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440533040 is a wasteful number, since it uses less digits than its factorization.

1440533040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53246 (or 53240 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1440533040 is about 37954.3546908652. The cubic root of 1440533040 is about 1129.3825535363.

Adding to 1440533040 its reverse (403350441), we get a palindrome (1843883481).

The spelling of 1440533040 in words is "one billion, four hundred forty million, five hundred thirty-three thousand, forty".